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if we are using two or more article directory for one article submission then it will be shown duplicate article by Google or not.
when Google are indexing to the one article on different sites it will be duplicate content or not and how many article directory we can use for one article posting.
Thanks & regards
There's no easy answer for a question like "how many". It might even be none at all, depending on what sites you submit to. Or it might be one or two will go to work for you, but then the power starts to fall away quite quickly after that in most cases.
The bottom line is that Google is not looking for links that you can placeon your own power. Google is looking for links that others place to you, freely given without any payment. Those are the links that will continue to work for you into the future.